From: Stephen Hemminger <stephen@networkplumber.org>
Date: Sat, 14 Jun 2014 01:06:25 +0000 (-0700)
Subject: virtio: simplify the hardware structure
X-Git-Tag: spdx-start~10499
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=ce65e697c67ba;p=dpdk.git

virtio: simplify the hardware structure

The host_features are never used after negotiation.
The PCI information is unused (and available in rte_pci if needed).

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Alan Carew <alan.carew@intel.com>
---

diff --git a/lib/librte_pmd_virtio/virtio_ethdev.c b/lib/librte_pmd_virtio/virtio_ethdev.c
index 22a9186522..b9f552938e 100644
--- a/lib/librte_pmd_virtio/virtio_ethdev.c
+++ b/lib/librte_pmd_virtio/virtio_ethdev.c
@@ -559,7 +559,7 @@ virtio_get_hwaddr(struct virtio_hw *hw)
 static void
 virtio_negotiate_features(struct virtio_hw *hw)
 {
-	uint32_t guest_features, mask;
+	uint32_t host_features, mask;
 
 	mask = VIRTIO_NET_F_CTRL_RX | VIRTIO_NET_F_CTRL_VLAN;
 	mask |= VIRTIO_NET_F_CSUM | VIRTIO_NET_F_GUEST_CSUM;
@@ -578,20 +578,20 @@ virtio_negotiate_features(struct virtio_hw *hw)
 	mask |= VIRTIO_RING_F_INDIRECT_DESC;
 
 	/* Prepare guest_features: feature that driver wants to support */
-	guest_features = VTNET_FEATURES & ~mask;
+	hw->guest_features = VTNET_FEATURES & ~mask;
 	PMD_INIT_LOG(DEBUG, "guest_features before negotiate = %x",
 		guest_features);
 
 	/* Read device(host) feature bits */
-	hw->host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
+	host_features = VIRTIO_READ_REG_4(hw, VIRTIO_PCI_HOST_FEATURES);
 	PMD_INIT_LOG(DEBUG, "host_features before negotiate = %x",
-		hw->host_features);
+		host_features);
 
 	/*
 	 * Negotiate features: Subset of device feature bits are written back
 	 * guest feature bits.
 	 */
-	hw->guest_features = vtpci_negotiate_features(hw, guest_features);
+	hw->guest_features = vtpci_negotiate_features(hw, host_features);
 	PMD_INIT_LOG(DEBUG, "features after negotiate = %x",
 		hw->guest_features);
 }
@@ -754,8 +754,6 @@ eth_virtio_dev_init(__rte_unused struct eth_driver *eth_drv,
 
 	pci_dev = eth_dev->pci_dev;
 
-	hw->device_id = pci_dev->id.device_id;
-	hw->vendor_id = pci_dev->id.vendor_id;
 #ifdef RTE_EXEC_ENV_LINUXAPP
 	{
 		char dirname[PATH_MAX];
diff --git a/lib/librte_pmd_virtio/virtio_pci.c b/lib/librte_pmd_virtio/virtio_pci.c
index 386d8e07b2..ca9c74822a 100644
--- a/lib/librte_pmd_virtio/virtio_pci.c
+++ b/lib/librte_pmd_virtio/virtio_pci.c
@@ -82,14 +82,14 @@ vtpci_write_dev_config(struct virtio_hw *hw, uint64_t offset,
 }
 
 uint32_t
-vtpci_negotiate_features(struct virtio_hw *hw, uint32_t guest_features)
+vtpci_negotiate_features(struct virtio_hw *hw, uint32_t host_features)
 {
 	uint32_t features;
 	/*
 	 * Limit negotiated features to what the driver, virtqueue, and
 	 * host all support.
 	 */
-	features = (hw->host_features) & guest_features;
+	features = host_features & hw->guest_features;
 
 	VIRTIO_WRITE_REG_4(hw, VIRTIO_PCI_GUEST_FEATURES, features);
 	return features;
diff --git a/lib/librte_pmd_virtio/virtio_pci.h b/lib/librte_pmd_virtio/virtio_pci.h
index a787fd2325..373f9dcbfc 100644
--- a/lib/librte_pmd_virtio/virtio_pci.h
+++ b/lib/librte_pmd_virtio/virtio_pci.h
@@ -162,21 +162,12 @@ struct virtqueue;
 #define VIRTIO_MAX_VIRTQUEUES 8
 
 struct virtio_hw {
+	struct virtqueue *cvq;
 	uint32_t    io_base;
-	uint32_t    host_features;
 	uint32_t    guest_features;
-
-	struct virtqueue *cvq;
-
-	uint16_t    vtnet_hdr_size;
-
 	uint32_t    max_tx_queues;
 	uint32_t    max_rx_queues;
-	uint16_t    device_id;
-	uint16_t    vendor_id;
-	uint16_t    subsystem_device_id;
-	uint16_t    subsystem_vendor_id;
-	uint8_t     revision_id;
+	uint16_t    vtnet_hdr_size;
 	uint8_t	    use_msix;
 	uint8_t     mac_addr[ETHER_ADDR_LEN];
 };